minor language fixes

spec.asciidoc

@@ -233,10 +233,10 @@ format to be easy to extend in the future.
 === Why not add some more field here and there?
 
 Good point. It's pretty hard to define a threshold: should we add a ``slogan`` for a radio? Image? Logo?
-Gallery? Frequency of broadcasting? We applied the principle of sticking to (what we felt was) the bare
-minimum, knowing that the standard is easily extendable, so future needs can be accomodated.
+Gallery? Frequency of broadcasting? We applied the principle of _Fewer format features are better_, knowing
+that the standard is easily extendable, so future needs can be accomodated.
 
-=== Why not extend RSS itself? We could add more info to the ``<channel>>`` tag
+=== Why not extend RSS itself? We could add more info to the ``<channel>`` tag
 
 That's a nice idea. However, we think this would make the adoption harder.